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  <meta name="description" content="GETEDGES gets the Sobel edge image.">
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<h1>getedges
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="box"><strong>GETEDGES gets the Sobel edge image.</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="box"><strong>function [imge,ix,iy]=getedges(img) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="fragment"><pre class="comment"> GETEDGES gets the Sobel edge image.
 
 USAGE:
     imge=getedges(img)
 
     [imge,ix,iy]=getedges(img)
 
 INPUTS:
     img: grayscale double image
 
 OUTPUTS:
     imge: the edge image
 
     ix: x component gradient image
 
     iy: y component gradient image</pre></div>

<!-- crossreference -->
<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../../matlabicon.gif)">
<li><a href="gscale.html" class="code" title="function g=gscale(f,method,low,high)">gscale</a>	GSCALE adjusts the scale of an image.</li></ul>
This function is called by:
<ul style="list-style-image:url(../../matlabicon.gif)">
<li><a href="findcorners.html" class="code" title="function imgcout=findcorners(img,debug)">findcorners</a>	FINDCORNERS is the main function called by the calibration GUI.</li></ul>
<!-- crossreference -->



<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function [imge,ix,iy]=getedges(img)</a>
0002 <span class="comment">% GETEDGES gets the Sobel edge image.</span>
0003 <span class="comment">%</span>
0004 <span class="comment">% USAGE:</span>
0005 <span class="comment">%     imge=getedges(img)</span>
0006 <span class="comment">%</span>
0007 <span class="comment">%     [imge,ix,iy]=getedges(img)</span>
0008 <span class="comment">%</span>
0009 <span class="comment">% INPUTS:</span>
0010 <span class="comment">%     img: grayscale double image</span>
0011 <span class="comment">%</span>
0012 <span class="comment">% OUTPUTS:</span>
0013 <span class="comment">%     imge: the edge image</span>
0014 <span class="comment">%</span>
0015 <span class="comment">%     ix: x component gradient image</span>
0016 <span class="comment">%</span>
0017 <span class="comment">%     iy: y component gradient image</span>
0018 
0019 dx =[-1 0 1; -2 0 2;-1 0 1];
0020 dy = dx';
0021 ix = conv2(img, dx, <span class="string">'same'</span>);   
0022 iy = conv2(img, dy, <span class="string">'same'</span>);
0023 
0024 imge=<a href="gscale.html" class="code" title="function g=gscale(f,method,low,high)">gscale</a>(sqrt(ix.^2+iy.^2),<span class="string">'minmax'</span>);</pre></div>
<hr><address>Generated on Sun 04-Apr-2010 17:13:59 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/" target="_parent">m2html</a></strong> &copy; 2005</address>
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